Grinding-machine



(No Model.) 3 Sheets-Sheet F. BANNER & T. P. EGAN.

GRINDING MACHINE.

No. 350,351. Patented Oct. 5, 1886.

(No Model.) 3 Sheets-Sheet 2'.

P. BANNER & T. P. EGAN.

GRINDING MAOHINE. N0. 350,351. Patented Oct. 5; 1886.

- (No Model.)

, F. DANNER & T. P. EGAN.

3 Sheets-Sheet 3 v GRINDING MACHINE. 4

Patented Oct. 5, 1886.

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" NITED STATES PATENT OF CE.

FREDRICK DANNER, OF HOME CITY, AND THOMAS P. EGAN, OF CINCINNATI, ASSIGNORS TO THE EGAN COMPANY, OF CINCINNATI, OHIO.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 350,351, dated October 5, 1886.

Application filed January 22, 1885. Serial No. 153,051. (No model.)

To all whom it may concern: 1

Be it known that we, FREDRIoK DANNER and THoMAs'P. EGANJesldents of Home City and Cincinnati, respectively, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Grinding-llfachines, of which the following is a specification.

Our invention relates to an improvementin 1 grinding-machines.

The object of our invention is to provide positive meansfor adjustingthepitch -and feed of the carriage which carries the material to the stone or emery-wheel for grinding without 1 interference from lost motion.

Another object of our invention is to provide convenient and positive means for the varying adjustments of the stock holding the tool to be ground.

, set forth in the description and claims.

Figure 1 is a top plan view of our improve ment. Fig. 2 is a section on line 00 m, Fig. 1. Fig. .3 is a detail view of the stock-adjusting mechanism. Fig. 4 is a perspective view of the frame. Fig. 5 is a skeleton plan view of the longitudinal slide-frame. Fig. 6 is a perspective view of one of the weighted arms. Fig. 6 is a detail crosssection and elevation 3c of the arms, showing their connection with theshaft. Fig. '7 is a perspective View ofthe entire machine. Fig. 8 is a frontelevation of the same. Fig. 9 is a detailview showing the rack and driving-pinion.

A represents the frame of the machine. It is preferably east hollow and provided with openings a.

B represents gains cut in the sides of the top of the frame, in which the slides O C of the 0 longitudinal adjustable frame work.

'b b represent ways on which the transverse reciprocating carriage F moves.

0 0 represent extensions rigidly connected to one of the slides C and one of the ways b 5 on which the driving mechanism for moving the tool is mounted.

0 represents the main driving-pulley, mounted on the main shaft 4. 0 represents a loose pulley mounted on the outer end of said shaft.

2 represents the transmitting pulley, also mounted on said shaft 4.

Other features of our invention will be fully.

3 represents a transmitting-pulley 011 the opposite end of shaft 4, vertically under the pulleys 6 7 8.

D represents a grindingstone or emerywheel mounted on a shaft, 5. A belt passes around pulleys 3 7, the latter running loosely on the shaft 9, which shaft isjonrnaled on the slides 0 and extension-arm c. 8 representsa driving-pulley keyed upon said shaft 9 on one side of pulley 7. 10 represents a bevel-gear keyed upon the outer end of said shaft 9.

1.1 represents a bevelgear keyed uponsleeve 12, which sleeve journals on shaft 9. 6 rep resents a driving-pulley attached to said 6 sleeve 12.

13 represents a bevel-gear journalcd on shaft 1 1, which meshes with and is driven by gears 10 and 11 in different direciions,-one ofwhich bevels runs as an idler, while the other is a driver.

15 represents a spur-gear keyed upon shaft 14 and meshing with gear 16, keyed upon shaft 17. On the outer end of shaft17is keyed the spur-gear 18, which meshes with the teeth 7 5' ofrack 19 on the under side of the carriage F, as shown in Fig. 9.

G represents an oscillating stock, which is jonrnaled 011 centers to studs g,wl1ich project up from the table, ,as shown in Figs. 1, 7, and 8.

f represents a slotted arm rigidly securedto the stock G, projecting forward.

0 represents a supporting-arm secured to the table F, provided with a pin or bolt work ing in the slot of arm], to which it is secured by a set-screw.

The slides (l O, working in the gains B of the frame A, are adjusted in or out in any desired fixed position, so as to set the stock G in the desired relation tothe grinder *D by the fol o lowing means: e

20 represents a shaft journaled on the frame A. It is provided with a grooved collar, t i, rigidly secured to the shaft, as shown in Fig. 3.

21 represents a screw-thread chased on the 5 outer end of the shaft, which passes loosely through the frame A and taps into a ledge, H, which projects downward from the under side of one of the ways I). I

22 represents a jam-nut for securing shaft 20 in any desired adjustment.

23 represents a hand-wheel for turning shaft 20, to draw it out or in for moving the slides O O and the table Font or in for adjusting the stock G to the grinder.

In order to prevent lost motion of the slides G in the gains B, and to hold the table F fixed in any desired adjustment, as well as to gage or limit the inward movement of the table F and ways I), we have provided the following means:

I .I represent weighted arms, each of which is the counterpart of the other,which are provided with. an offset, M, on the upturned arm above the pivots L, so as to engage with the grooved collar or Collars i. A weight, N, is placed upon the outer end of arm I, which draws the table F and slide 0 inward and holds them in that position for work; but to take up lost motion of the arm I in the collars i i the arm J is also weighted by weight n, and adjusted near the inner end of the arm. Veight N holds the stock and tool to the fixed inward adjustment.

To limit the inward movement of the table we have provided the adj ustingscrew 24, which taps through ing 29 on flange H,that is attached to the outer way I). The inner end of the screw 2 1 rests against the frame A.

25 represents the jam-nut for holding the adjusting-screw 2-1: in its fixed position.

The table F, which carries the stock G- laterally across the face of the grinder I), is operated in the following manner: The knife or tool is attached to the stock G. It is set at the desired angle by the adjusting-arms c f. The grinder D is driven by a belt passing over pulleys l 2.

The carriage is moved laterally by gears 10 11 13, driven by a belt passing over the pulleys 3 and 6 7 S, which is shifted onto the pulley 8 or 6 in the following manner: 1 rep resents a belt-shifting arm keyed upon rod 27. R represents a rectangular opening made in arm P, through which the belt which drives the wheels 6 7 8 runs loosely. a lever hinged or pivoted to rod 27 on its inner end, and connected to the cross-piece 28 by pivot 28, secured to the frame, and its front end projecting under the table and ways through an opening in the flange H. 30 31 represent adjustable fingers secured to the table, which alternately shift the lever 26 and the belts from pulleys G to 8, or vice versa, by the reciprocation of the carriage. Pulley 8 drives shaft 9, transmitting power through bevels 10 to 13 to shaft 14, driving spurgear 15 in one direction, which spur transmits power to gear 16, shaft 17, and gear 18, which engages with the rack-teeth and moves the table in one direction. The reverse movement of the table F is made by shifting the belt on pulley 6, which drives sleeve 12 and spur-gear 11 attached thereto, transmitting power to bevel 13, shaft 14, and spur 15, turning them in the reverse direction, and likewise gear 16, shaft 17, and spur'gear 18,which moves or reciprocates table F also in the opposite direction.

26 represents.

o have found by experience that the means herein described and shown adjust the tool to the grinder accurately, and hold it to a fixed position without any lost motion.

The counterpoise n, acting upon the separate collar 2', exerts a constant force in counwhich the same is produced is compensated by the construction shown, so that the long continued use of the machine does not tend to cause inaccuracy due to the backlash pro duced by the wear of the parts.

\Ve claim- 1. The combination, in agrinding-machine, of the frame A, having gains 13, the adjust able slides (l, fitting in said gains, extensions 0 c, and ways I), connected to said slides, reversing-gears 10, 11, and 13, supported in said extensions, and the connected driving mech anism. substantially as described.

2. The combination, with the frame A and adjustable slides O, mounted thereon, of the driving and reversing mechanism mounted upon and moved with said frame, and consisting of the gears 10 and 11, the interposed gear meshing with said gears, and the tight pul leys 6 and 8 and loose pulley 7, the former for operating the driving-gears alternately, while the latter serves as an idler, substantially as described.

3. The combination, with the extension ii, of table 0, having ways I), the shaft 20, an adjusting screw and nut connecting said shaft and extension, and weighted arms I J, substantially as described.

4. In combination with the ways 6 and slideframe G, carrying said ways, the adjustingrod 20, the weighted arms I J, engaging said rod, and the set-screw 24, resting against the frame A, to limit the inward movement of the ways, substantially at specified.

5. In combination with the adjusting-shaft 20, the weighted levers I J, adapted to engage and hold the shaft 20 in its desired fixed position without lost motion, substantially as specified.

In testimony whereof we have hereunto set our hands.

F. BANNER. THOS. I. EGAN.

Witnesses:

EDWARD BOYD. ROBERT ZAHNER,

IIO 

